Arduino Leonardo serial communication

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votes

The USB port on my Arduino Leonardo broke off and I don't have a USB-to-serial adapter. Is it possible to wire a USB cable to the TX, RX, Vin, and GND pins so that I can use serial communication between it and my computer?

(It already has my sketch on it.)

1
serial-portarduinousb
USB is a bus, and has a bus protocol. It is far more complex than a simple communications link like RS232. So "no". – sawdust
But the atmega32u4 has built in usb to serial conversion, so I assumed it would still work? – user2168621
If the "USB port on my Arduino Leonardo" is a device port, and you installed the ACM driver on the PC, then a host-to-device connection is possible. – sawdust

1 Answers

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Yes, you can solder a USB cable (just cut the type B end off of a standard A-B cable) onto the exposed pads where the port used to be.

Unlike other Arduinos, the Leonardo does not have a built-in USB-to-serial converter the drives the USB port. The microcontroller firmware provides USB device-mode support directly. It also has serial I/O pins.